AutoCodes – Generic – B242C

B242C Code - Driver Seat Temperature Request Circuit

Quick Answer

When a heated or cooled seat switch is pressed, a LIN Bus message is sent to the Body Control Module (BCM) indicating the heated or cooled seat request. Common causes include Faulty Seat Blower Assembly, Seat Blower Assembly harness is open or shorted, Seat Blower Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B242C indicates Driver Seat Temperature Request Circuit.
Common causes: Common causes include Faulty Seat Blower Assembly, Seat Blower Assembly harness is open or shorted, Seat Blower Assembly circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,979

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B242C Description

When a heated or cooled seat switch is pressed, a LIN Bus message is sent to the Body Control Module (BCM) indicating the heated or cooled seat request. The BCM then sends a low side Pulse Width Modulation (PWM) signal through the heated/cooled seat mode signal circuit to the seat back and seat cushion blower assemblies for the appropriate seat.

OBDII Code B242C - Driver Seat Temperature Request Circuit - AutoCodes.com — B242C Code - Driver Seat Temperature Request Circuit

What does this mean?

What are the Possible Causes of the DTC B242C?

Faulty Seat Blower Assembly
Seat Blower Assembly harness is open or shorted
Seat Blower Assembly circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B242C?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B242C code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B242C code?

Need more information on how to fix the B242C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B242C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B242C Buick — Driver Seat Temperature Request Circuit
B242C Cadillac — Driver Seat Temperature Request Circuit
B242C Chevrolet — Driver Seat Temperature Request Circuit
B242C GMC — Driver Seat Temperature Request Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B242C Code

1. What does the OBDII code B242C mean?

B242C indicates an issue in the driver seat temperature request circuit, typically related to the seat heating or cooling system.

2. What are the common symptoms of the B242C code?

Symptoms may include the driver seat heater or cooler not working, uneven seat temperature, or the HVAC system displaying an error.

3. What causes the B242C code to appear?

Common causes include a faulty seat temperature control module, damaged wiring, a bad seat heating/cooling element, or a malfunctioning control switch.

4. How can I diagnose the B242C code?

Use an OBDII scanner to confirm the code, then inspect the driver seat temperature control module, wiring connections, and heating/cooling elements for damage or faults.

5. Can I drive with the B242C code active?

Yes, but the driver seat heating or cooling functionality may not work properly, which could affect comfort.

6. How do I fix the B242C code?

Repairs may include replacing a faulty seat temperature module, repairing damaged wiring, or replacing the heating/cooling elements in the seat.

7. How much does it cost to repair the B242C code?

Repair costs vary but can range from $100 to $500 depending on parts, labor, and the extent of the issue.

8. Can a blown fuse cause the B242C code?

Yes, a blown fuse in the seat heating or cooling circuit could trigger this code, so checking the fuse box is a good first step.

9. Will clearing the B242C code without repairs solve the issue?

Clearing the code may remove the warning temporarily, but the underlying issue will cause the code to return.

10. Can I fix the B242C code myself?

If youâ€™re comfortable with basic electrical work, you can inspect wiring and connectors or replace small components. For complex issues, professional repair is recommended.